The blue line shows the settlement price of Dec’16 cotton futures on the ICE. The scale of the futures price is on the left side of the chart, in cents per pound. The red line shows the premium associated with a $0.70 strike put option on Dec’16 futures. The scale of the options premium is on the right side of the chart, also in cents per pound. The put option premium generally increases when Dec’16 futures are declining, and it gets cheaper when the futures price rises. The Dec’16 ICE cotton contract generally was in an uptrend across the calendar year. As such was more of a sideways gyration in a not-quite-profitable range. Since there was no major downtrend in ICE futures, the purchase of put options in this situation would have been insurance that one didn’t collect on.